Survival and Competitiveness of Bradyrhizobium japonicum Strains 20 Years after Introduction into Field Locations in Poland.

摘要: It was previously demonstrated that there are no indigenous strains of Bradyrhizobium japonicum forming nitrogen-fixing root nodule symbioses with soybean plants in arable field soils Poland. However, bacteria currently classified within this species present (together canariense) as populations specific for nodulation legumes the Genisteae tribe. These rhizobia, infecting such lupins, well established Polish soils. The studies described here were based on experiments, at Poznan University Life Sciences Experiment Station Gorzyn, Poland, and initiated spring 1994. Long-term research then conducted order to study relation between B. USDA 110 123, introduced together into same location, where rhizobia earlier detected, competitive success followed over time. Here we report extra-long-term saprophytic survival nodulating soybeans inoculants 20 years not grown next 17 years. remained viable symbiotically competent, molecular immunochemical methods showed undistinguishable from original inoculum 123. We also show had balanced numbers their mobility soil low. To our knowledge, is first showing persistence soybean-nodulating analyzing long-term relations 123 after two strains, neither which native, environment almost 2 decades ago.